<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
#(na.get(1))

<br>



#("ABCDE".substring(0, 2))
你好
#(na.get(0))


#if(true)
    123
#end

</body>
</html>